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Preparation of double network hydrogel and the obtained double network hydrogel and its application

A hydrogel and double network technology, applied in the field of natural polymer materials, can solve problems such as poor manufacturability, poor functionality, and poor recovery of hydrogels

Active Publication Date: 2021-03-30
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogel obtained by the double network structure involved in the current prior art still has disadvantages such as poor recovery, poor elasticity, poor functionality, and poor manufacturability.

Method used

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  • Preparation of double network hydrogel and the obtained double network hydrogel and its application
  • Preparation of double network hydrogel and the obtained double network hydrogel and its application
  • Preparation of double network hydrogel and the obtained double network hydrogel and its application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] The present invention provides a kind of preparation method of double network hydrogel, described method comprises the following steps:

[0058] Step 1, using monovalent cation salt and sodium alginate to construct sodium alginate supramolecular fiber network.

Embodiment approach

[0059] According to a preferred embodiment of the present invention, step 1 includes the following sub-steps:

[0060] Step 1-1, adding the monovalent cation salt into water, stirring to obtain a monovalent cation salt solution;

[0061] Step 1-2, adding sodium alginate into the monovalent cation salt solution obtained in step 1-1, stirring to obtain a mixed solution;

[0062] In step 1-3, the mixed solution obtained in step 1-2 is left to stand to form a supramolecular fiber network of sodium alginate.

[0063] According to a preferred embodiment of the present invention, in step 1-1, the monovalent cation salt is a water-soluble monovalent cation salt.

[0064] In a further preferred embodiment, in step 1-1, the monovalent cation salt is selected from one or more of water-soluble sodium salts, water-soluble potassium salts and water-soluble lithium salts.

[0065] In a further preferred embodiment, in step 1-1, the monovalent cation salt is selected from one of sodium chlo...

Embodiment 1

[0118] According to the mass ratio of 1.75:1, weigh 1.75g ​​sodium chloride and 1g sodium alginate respectively, and set aside;

[0119] Dissolve the obtained sodium chloride with deionized water to prepare a sodium chloride solution with a mass percentage concentration of 3.6%, dissolve the obtained sodium alginate powder in the above sodium chloride solution, and stir evenly to obtain the concentration of sodium alginate 2wt% mixed solution;

[0120] The mixed solution was left to stand for 12 hours to form a supramolecular fiber network.

[0121] Add 16g acrylamide, 0.0096g N,N'-methylenebisacrylamide, 0.016g ammonium persulfate, 0.04g N,N,N',N'-tetramethyl ethylenediamine, stirred evenly, stood at room temperature for 0.5h, and reacted at 50°C for 3h to obtain sodium alginate-acrylamide double network hydrogel.

[0122] Such as Figure 2~3 As shown, the obtained sodium alginate supramolecular fiber network-polyacrylamide double network hydrogel has a breaking elongation...

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Abstract

The invention discloses a preparation method of novel double-network ionic hydrogel, and obtained double-network hydrogel and application thereof. The method comprises the following steps: firstly, obtaining a sodium alginate supramolecular fiber network, and then, performing cross-linking polymerization on the sodium alginate supramolecular fiber network and acrylamide monomers together to obtainthe novel double-network hydrogel, namely sodium alginate-polyacrylamide double-network hydrogel. The preparation method is simple and easy to realize; the obtained ionic conduction double-network hydrogel has excellent characteristics of robustness, toughness, softness, elasticity, fatigue resistance and the like, solves the contradiction between robustness and toughness as well as between softness and elasticity, and simultaneously has excellent injectability and self-healing capability; and the novel double-network hydrogel can generate an effective current at an ultra-low voltage (0.04V),can realize induction to ultra-small and ultra-large strains, can reach an ultra-wide strain induction range (0.3%-1800%), and can be used for ionic skin, tissue organs, wearable devices, resistancesensors and the like for 3d printing.

Description

technical field [0001] The invention relates to the field of natural polymer materials, in particular to a double-network hydrogel, in particular to a preparation method and application of a sodium alginate-polyacrylamide ion-conductive double-network hydrogel. Background technique [0002] Hydrogel refers to a three-dimensional network polymer structure that can quickly absorb and retain a large amount of water but is insoluble in water. The hydrogel can maintain a high water content through the swelling of the polymer, forming a special flexible wet structure with properties between solid and liquid. This feature makes hydrogels have a wide range of applications, such as tissue engineering, drug controlled release, bio-nanotechnology and other fields. However, most conventional synthetic hydrogels have weak mechanical strength and insufficient toughness, which hinders their further applications. [0003] In order to improve the mechanical properties of hydrogels, researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/54C08F222/38C08J3/075C08L33/26C08L33/24C08L5/04
CPCC08F220/54C08F220/56C08J3/075C08J2333/24C08J2333/26C08J2405/04C08F222/385
Inventor 隋坤艳盛楠楠张肖辉王丽男谭业强范汶鑫夏延致
Owner QINGDAO UNIV